CVE-2021-46998
ethernet:enic: Fix a use after free bug in enic_hard_start_xmit
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Description
In the Linux kernel, the following vulnerability has been resolved: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside enic_queue_wq_skb, if some error happens, the skb will be freed by dev_kfree_skb(skb). But the freed skb is still used in skb_tx_timestamp(skb). My patch makes enic_queue_wq_skb() return error and goto spin_unlock() incase of error. The solution is provided by Govind. See https://lkml.org/lkml/2021/4/30/961.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976
- https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3
- https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3
- https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1
- https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24
References (6)
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